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Shape‐ and Size‐Controlled Synthesis of Mn 3 O 4 Nanocrystals at Room Temperature
Author(s) -
Chen Chao,
Jian Hong,
Mai Kaiguang,
Ren Zhimin,
Wang Jia,
Fu Xinxin,
Fan Chenyao,
Sun Chunxiao,
Qian Guodong,
Wang Zhiyu
Publication year - 2014
Publication title -
european journal of inorganic chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.667
H-Index - 136
eISSN - 1099-0682
pISSN - 1434-1948
DOI - 10.1002/ejic.201400013
Subject(s) - nanocrystal , tetrahydrate , chemistry , catalysis , aqueous solution , hydrazine (antidepressant) , nanoparticle , nanomaterials , manganese , nanotechnology , chemical engineering , inorganic chemistry , crystallography , organic chemistry , materials science , crystal structure , chromatography , engineering
Abstract A versatile synthetic method has been developed for the fabrication of Mn 3 O 4 nanocrystals with different sizes and shapes, such as square nanoplates, mesocrystal nanodisks, and nanopolyhedra. Manganese(II) acetate tetrahydrate and hydrazine monohydrate were the only two reactants used in aqueous solution, and no surfactant was employed. The key advantages of our approach are (1) the room‐temperature synthesis, (2) the facile operation, (3) the flexibility in shape‐ and size‐control, and (4) the ease of scale‐up. The exposed surfaces of the as‐prepared nanoparticles were carefully characterized and indexed. The catalytic properties of the nanoplates for the degradation of methylene blue were evaluated in detail. The catalytic properties are closely related to the shape and size of the Mn 3 O 4 nanocrystals, and nanoplates with a size of 50 nm exhibited the best catalytic performance. The magnetic properties were investigated with a superconducting quantum interference device magnetometer.